So how many individuals of how many species are you trying to sell? If your an individual and have say 5 individuals from 3 species then you could get lucky and sell them all to public aquaria. Trading could be more difficult as there are typically more restrictions with transferring rare specimens out of any sort of official institution than into it and it would be preferred to go to another public aquaria. From a business aspect individuals have much more disposable income and incentive to acquire these kinds of animals. It may only be $1000 each but at home I could set up a tank and house two for $3k total in a dedicated system and ten minutes a day. At a public aquarium that could cost from $10-100k for the display and $10k a year to maintain them, you haven't given much info of what your selling and if you had it wouldn't be much easier to estimate. You may make a few sales to public aquariums but long term the public is your market. From a business perspective you could either command a higher price for sustainable aquaculture or undercut imports by 10% for market share. Either way if they are so expensive you can only sell 10 a year that may or may not work for you as a hobbyist or business. Finding the middle ground on price and making a real rarity available to the masses for $2-500 and fairly consistent supply is your best bet for selling a decent number a year. Selling 4x as manny at half the cost still makes you twice the income, profits per work hour though may skew that out of favor, find the middle ground.
. Bay Area Reefers, a local reef club.
